5.3

CVE-2026-44029: nixos nix Absolute Path Traversal

CVSS: 5.3v3.1MediumDeferred
AliasesUBUNTU-CVE-2026-44029DEBIAN-CVE-2026-44029
Published 05-05-2026Last modified 05-05-2026
Open JSON

Vulnerability summary

CVE-2026-44029 is a medium (CVSS 5.3) Absolute Path Traversal vulnerability in nixos nix. EPSS estimates a 0.75% chance of exploitation in the next 30 days, higher than 54.5% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.75%
0%100%
Low · +0.18 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4
RHSA-2026:10208RHSA-2026:10999RHSA-2026:7046RHSA-2026:9438

Timeline

  1. 05-05-2026
    PublishedVulnerability first disclosed.
  2. 05-05-2026
    Last modifiedVulnerability information updated.

Description

An issue was discovered in Nix before 2.34.7. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal. The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 (introduced in 2.24.7);

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.75%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

+0.18 pp

From 0.57% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.75%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • nixAll versions (No fix recorded) | < 2.34.8+dfsg-1
Nixos1 product
  • nix≥ 2.24.7, < 2.28.7 | ≥ 2.29.0, < 2.29.4 | ≥ 2.30.0, < 2.30.5 | ≥ 2.31.0, < 2.31.5 | ≥ 2.32.0, < 2.32.8 | ≥ 2.33.0, < 2.33.6 | ≥ 2.34.0, < 2.34.7
Ubuntu1 product
  • nixAll versions (No fix recorded)

3 vendors · 3 products

References

6 links